Why is concave mirror used in Searchlight & head lights? When the bulb of headlight is placed at focus of concave mirror, it allows the light to spread out to infinity (longer distances) and at infinity they are approximately parallel. Hence, concave mirrors are used in the headlights of vehicles. What is the role of […]
Does tin foil block 5G?
Does tin foil block 5G? Tinfoil can block the transmission and receipt of electromagnetic field (EMF) radiation and radio frequency (RF). 5G enables connectivity by transmitting and receiving radio waves or radiofrequency electromagnetic fields with base stations. By blocking these emissions, it will block 5G. Are Faraday cages legal? The effect was discovered in 1836 […]
What simple machine is dominoes?
What simple machine is dominoes? lever Did Rube Goldberg build his machines? A prolific cartoonist and visionary, Rube Goldberg has become more famous for the inventions bearing his name than for his cartoons and political illustrations. Within his comic strips Goldberg created extremely complex machines that were built to perform a simple task. What is […]
Where is the magnetic field in a coiled current carrying wire the strongest?
Where is the magnetic field in a coiled current carrying wire the strongest? The magnetic field is strongest inside the coil. This is because the effects of both sides of the vertical part of the wires add up at the centre. What are the advantages of electromagnet over permanent magnet? The main advantage of an […]
What 3 parts are in a nucleotide?
What 3 parts are in a nucleotide? Nucleotides are composed of three subunit molecules: a nucleobase, a five-carbon sugar (ribose or deoxyribose), and a phosphate group consisting of one to three phosphates. The four nucleobases in DNA are guanine, adenine, cytosine and thymine; in RNA, uracil is used in place of thymine. Which of the […]
Why does ATP have so much energy?
Why does ATP have so much energy? Adenosine triphosphate (ATP) is the energy currency for cellular processes. The more bonds in a molecule, the more potential energy it contains. Because the bond in ATP is so easily broken and reformed, ATP is like a rechargeable battery that powers cellular process ranging from DNA replication to […]
What are some long term consequences of desertification?
What are some long term consequences of desertification? Desertification reduces the ability of land to support life, affecting wild species, domestic animals, agricultural crops and people. The reduction in plant cover that accompanies desertification leads to accelerated soil erosion by wind and water. How can we reduce land degradation? 5 possible solutions to soil degradation […]
Do gravitons have mass?
Do gravitons have mass? Gravitons do indeed have mass, and their motions generate kinetic energy. Other particles have mass, but they are much larger, much less numerous, and cannot substitute for the gravitational effects which generate space curvature. The great mystery of so-called force at a distance is explained by the mass of gravitons. Are […]
What are the major steps in homeostasis?
What are the major steps in homeostasis? Adjustment of physiological systems within the body is called homeostatic regulation, which involves three parts or mechanisms: (1) the receptor, (2) the control center, and (3) the effector. The receptor receives information that something in the environment is changing. What happens to the body after exercise homeostasis? To […]